(19)

(11)

EP 0 774 096 A1

(12)

(43) Date of publication: 21.05.1997 Bulletin 1997/21 (21) Application number: 95931040.0 (22) Date of filing: 31.08.1995

(51) International Patent Classification (IPC):  F17D 1/ 05( . ) C10L 3/ 06( . ) C09K 8/ 52( . ) (86) International application number: PCT/US1995/011065 (87) International publication number: WO 1996/008672 (21.03.1996 Gazette 1996/13)

(84) Designated Contracting States: DE GB IT NL (30) Priority: 15.09.1994 US 19940306336 24.05.1995 US 19950449151 (71) Applicant: EXXON PRODUCTION RESEARCH COMPANY Houston, TX 77252-2189 (US)

(72) Inventors: COLLE, Karla, Schall Houston, TX 77062 (US) COSTELLO, Christine, Ann Easton, PA 18040 (US) OELFKE, Russell, Harlan Houston, TX 77084 (US) TALLEY, Larry, Dalton Friendswood, TX 77546 (US) LONGO, John, Michael Houston, TX 77079 (US) BERLUCHE, Enoche Phillipsburg, NJ 08865 (US) (74) Representative: Mitchell, Alan, et al  Hoffmann, Eitle & Partner, Arabellastrasse 4 81925 München 81925 München (DE)